'\" te
.\" Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
.\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE.  If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
.TH SCSI_GET_DEVICE_TYPE_STRING 9F "Jul 12, 2007"
.SH NAME
scsi_get_device_type_string \- look up per-device-type, returning matching
information string
.SH SYNOPSIS
.nf
#include <sys/scsi/scsi.h>



\fBchar\fR \fB*scsi_get_device_type_string\fR(\fBchar *prop_name,
		dev_info_t  *\fR\fIdip\fR, \fBstruct scsi_device  *\fR\fIdevp\fR);
.fi

.SH INTERFACE LEVEL
illumos DDI specific (illumos DDI).
.SH PARAMETERS
.ne 2
.na
\fB\fIprop_name\fR\fR
.ad
.RS 13n
Name of string array property that contains a list of paired device-type
information.
.RE

.sp
.ne 2
.na
\fB\fIdip\fR\fR
.ad
.RS 13n
Pointer to the device info node for this HBA driver.
.RE

.sp
.ne 2
.na
\fB\fIdevp\fR \fR
.ad
.RS 13n
Pointer to a \fBscsi_device\fR(9S) structure of the target.
.RE

.SH DESCRIPTION
The \fBscsi_get_device_type_string()\fR function looks up the \fIprop_name\fR
property, which can be specified in the HBA's \fBdriver.conf\fR(5)file. This
property allows specification of per-device-type information. The syntax for
\fIprop_name\fR in a \fBdriver.conf\fR(5) file is:
.sp
.LP
The formal syntax is:
.sp
.in +2
.nf
prop_name = \fI<duplet>\fR [, \fI<duplet>\fR *];
.fi
.in -2
.sp

.sp
.LP
where:
.sp
.in +2
.nf
\fI<duplet>\fR := \fI"<vid+pid>"\fR, \fI"<information"\fR
.fi
.in -2
.sp

.sp
.LP
The string \fI<vid+pid>\fR is returned by the device on a SCSI inquiry command.
This string can contain any character in the range 0x20-0x7e. Characters such
as double quote (") or single quote ('), which are not permitted in property
value strings, are represented by their octal equivalent (for example, \e042
and \e047). Trailing spaces can be truncated.
.sp
.LP
For example:
.sp
.in +2
.nf
scsi_vhci_failover_override =
	    "STK     FLEXLINE 400",	"f_asym_lsi",
	    "SUN     T4",		"f_tpgs";;
.fi
.in -2
.sp

.sp
.LP
The \fBscsi_get_device_type_string\fR() function searches the list of duplets
for a matching INQUIRY string. If a match is found,
\fBscsi_get_device_type_string\fR returns a copy of the <\fIinformation\fR>
string. The meaning of the returned <\fIinformation\fR> string is determined by
the caller.
.SH RETURN VALUES
\fBscsi_get_device_type_string()\fR returns a copy of the matching
<\fIinformation\fR> string, or if no match is found, \fBNULL\fR is returned.
When a non-NULL value is returned, the caller is responsible for freeing the
<\fIinformation\fR> string via:
.sp
.in +2
.nf
kmem_free(info, strlen(info) + 1);
.fi
.in -2

.SH CONTEXT
This function can be called from kernel or interrupt context.
.SH SEE ALSO
.BR driver.conf (5)
.sp
.LP
\fIWriting Device Drivers \fR
